1100440 has 64 divisors (see below), whose sum is σ = 2812320. Its totient is φ = 384000.

The previous prime is 1100419. The next prime is 1100441. The reversal of 1100440 is 440011.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18010 + ... + 18070.

2^1100440 is an apocalyptic number.

1100440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1100440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1406160).

1100440 is an abundant number, since it is smaller than the sum of its proper divisors (1711880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1100440 is a wasteful number, since it uses less digits than its factorization.

1100440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1100440 is about 1049.0185889678. The cubic root of 1100440 is about 103.2417734458.

Adding to 1100440 its reverse (440011), we get a palindrome (1540451).

It can be divided in two parts, 1100 and 440, that added together give a triangular number (1540 = T₅₅).

The spelling of 1100440 in words is "one million, one hundred thousand, four hundred forty".